Mark worries that his sleepwalking brother may be guilty of murder.

A fiendish med student sells prescription pads to a drug dealer and murders his partner when she becomes too needy. Mark plays Columbo to nail the murderer.

Steve investigates a murder in which the main suspect is the husband of Mark's old flame. Steve and Jesse date the same girl.

A med student, surrogate daughter to Madison Wesley, is sent to a rehab program to kick drugs. Once there, she's wrongly accused of murdering a fellow patient. Mark sets his sights on bringing down the real culprit.

Hospital horticulturist Claude is revealed to be an escaped convict living under an assumed name for the past 10 years. Mark fights to shelter Claude from extradition while striving to prove his innocence.

A young med student is suspected of killing her abusive husband after her story of murderous burglars proves false.

An old friend of med student Alex Martin is mixed up in the murder investigation of an L.A. 'madam'. Mark suspects Alex's friend may be more deeply involved in the madam's business than she lets on. Meanwhile, Madison Wesley is stalked by a homicidal killer who's recently undergone plastic surgery.

Madison moves in with her new paramour, unaware that he's trying to kill her. Jesse is suspected of being the anonymous author of a tell-all book that places hospital workers in spicy relationships.